SGER: Fire Frequency and Trace Gas Flux in Grassland: Relationship to Remotely Sensed Indices of Net Primary Production

Konza Prairie Research自然区的一场野火吞噬了2000多公顷的高草草原，为建立甲烷、一氧化二氮和二氧化碳通量与净第一性生产力(NPP)之间的关系创造了一个独特的机会。这场大火留下了一系列具有不同火灾历史的分水岭。这些流域的土壤碳和氮量也不同，这两个因素对痕量气体通量和净初级生产力有很大影响。通过清除凋落物，NPP的其他限制(水和光限制)中的流域水平差异已最小化。通过同时获得痕量气体通量测量、地面树叶生物量测量和卫星图像，莱斯、西斯特特、塔特、特纳和本宁博士提出了在温带半湿润草原上建立甲烷通量、一氧化二氮通量和净初级生产力之间的关系。在Konza Prairie进行的研究处于草原研究的前沿，这些调查人员可以使用的设施非常出色。

A wildfire that consumed more than 2000 ha of tallgrass prairie on Konza Prairie Research Natural Area created a unique opportunity to establish the relationship between methane, nitrous oxide, and carbon dioxide fluxes and net primary productivity (NPP). The fire left a matrix of watersheds with various fire histories. These watershed also vary in soil carbon and nitrogen amounts, factors which strongly influence trace gas flux and NPP. Watershed level differences in other constraints to NPP (water and light limitations) have been minimized by removal of litter. By concurrently obtaining trace gas flux measurements, ground measurements of foliage biomass, and satellite images, Drs. Rice, Seastedt, Tate, Turner and Benning propose to establish the relationship between methane flux, nitrous oxide flux and NPP in temperate semi-humid grasslands. Research conducted at the Konza Prairie is at the leading edge of grassland studies and the facilities available to these investigators are outstanding.